Hi i don't see any reason why you can't use them together but i think it's better to ask to the professionals here Obeus is not contextual, advertisers have to pick up your site if they want to advertise, so do you see a reason why i couldn't use them together with adsense. Thanks in advance for your reply.
I think you can use the obeus banner. I use that in my blog with adsense. But I personally don't like obeus because they didn't credit $5 for sign up which they mention in their promotional advertisement
I have received my 5$ but you can only use it to advertise. The problem with obeus is that the earning per click is very low. The positve thing is that you can advertise your site almost for free on other sites.